Stephen D Shu, Age 54Ithaca, NY

6511402, Jan 28, 2003

Jan 23, 2001

09/768775

Stephen K. Shu - Fountain Valley CA
Kirk A. Buhler - Corona CA
James W. Pittaway - Anaheim CA

Unisen, Inc. - Irvine CA

A63B 2100

482 4, 482900

An exercise machine is described which is entirely self-contained without any source of outside power. A rechargeable battery is used to maintain the exercise system operative for a time-out period. At all other times the machine is powered by the user. The machine is compact, light, rigid and sized to fit through a standard doorway. The entire exercise machine is provided with a wrap-around handrail into which a display input/output unit has been integrally provided. The exercise machine or stepper utilizes a dynamically controllable load or alternator which is controlled by a computer circuit to maintain the power input into the exercise machine or to maintain metabolically energy consumption rate within a user of the exercise machine at a predetermined, approximately constant level, regardless of the speed of stepping or the actual or effective weight of the user. The alternator is dynamically controlled by pulse width modulating its field coils. The power output by the generator is sensed by monitoring the alternators output current and voltage.

7200088, Apr 3, 2007

Jan 10, 2002

10/043688

Mark Oscar Worthington - Irvine CA, US
Stephen Kou-An Shu - Laguna Niguel CA, US
Kevin Robert McIntyre - Irvine CA, US

Burstein Technologies, Inc. - Irvine CA
Nagaoka & Co., Ltd. - Hyogo

G11B 11/03

369 5331, 369 4441

An optical disc system includes a photo detector circuit of an optical disc drive and a signal processing system. The photo detector circuit is configured to generate at least one information-carrying signal from an optical disc assembly. The signal processing system is coupled to the photo detector circuit to obtain from the at least one information-carrying signal both operational information used to operate the optical disc system and data indicative of presence and/or characteristics of an investigational feature associated with the optical disc assembly. Methods and discs for imaging a biological or medical investigational feature are also provided.

8419789, Apr 16, 2013

Nov 23, 2011

13/304251

Stephen K. Shu - Irvine CA, US
Benton Bejach - North Tustin CA, US

Patentsplus LLC - North Tustin CA

A61M 1/10

623 31

Disclosed herein is a fully implantable artificial heart. The use of flat helical springs to align and reciprocate a bellows structure allows the bellows to pump blood, the multiple solenoids with floating magnetized rods and permanent magnet assemblies held by the flat helical springs provide the power. The artificial heart pumps blood with virtually no friction and no parts to wear out. The use of solenoids advantageously move blood in a gentle, controllable manner.

2008006, Mar 13, 2008

Apr 2, 2007

11/695369

Mark Worthington - Irvine CA, US
Stephen Shu - Laguna Niguel CA, US
Kevin McIntyre - Irvine CA, US

G11B 11/03

369053310

An optical disc system includes a photo detector circuit of an optical disc drive and a signal processing system. The photo detector circuit is configured to generate at least one information-carrying signal from an optical disc assembly. The signal processing system is coupled to the photo detector circuit to obtain from the at least one information-carrying signal both operational information used to operate the optical disc system and data indicative of presence and/or characteristics of an investigational feature associated with the optical disc assembly. Methods and discs for imaging a biological or medical investigational feature are also provided.

5050021, Sep 17, 1991

Mar 16, 1990

7/495034

Stephen K. Shu - Fountain Valley CA
John A. Rawson - Orange CA
Robert C. Beauchamp - Westminster CA

Del Mar Avionics - Irvine CA

G11B 511

360 95

A micro cassette recorder-player is disclsoed having capactity for increased signal-to-noise ratio by utilizing a mobile capstan which pulls tape out of a micro cassette and across an enlarged head placed distal to and shielded from all electric motors, solenoids, and inductors which typically create spurious electric and magentic flux fields that traditionally diminish S/N.

4157571, Jun 5, 1979

May 20, 1977

5/798765

Stephen K. Shu - Fountain Valley CA

Del Mar Avionics - Irvine CA

G11B 500

360 8

Apparatus under control of an operator for selectively displaying signals stored on a magnetic tape. The tape is normally first played back at a high speed, with the reproduced signal displayed at high speed to permit the operator to determine which parts of the tape to view at real-time speed. In the real-time viewing mode, a segment of the tape is played again at high speed to provide a better quality signal; the signal from the segment is converted to digital form and stored in a memory for use in creating a real-time display. The operator then can view the display of the stored signal in a variety of ways: stationary, advancing at real-time speed, or in reverse at real-time speed. The length of the segment stored is relatively short to minimize the size of the memory. After a segment is played back, the tape is brought to a stop and then moved in the opposite direction to position it for playing back the next segment.

5504732, Apr 2, 1996

Aug 15, 1990

7/570144

David P. Gregg - Culver City CA
Kitchener C. Wilson - Santa Barbara CA
Stephen K. Shu - Fountain Valley CA

Del Mar Avionics - Irvine CA

G11B 7125

369116

A novel method and apparatus utilizing conventional photo-reactive and reflective layers of a recording medium for optically recording and reading both digital and variable length, analog pulses of data, in an exacting manner to eliminate excess energy absorption by the medium and for reducing latent recording errors due to defects in the recording medium as well as due to the recording process itself. With this precise recording and reading technique, analog variable-length pulse recording, with its inherent wide bandwidth, as well as coded digital pulse recording, with its inherent narrow bandwidth, can be accommodated. The system monitors the optical transmissivity and reflectivity of the recording medium during the recording process in real time to accurately determine initial and terminal inflection points denoting inception and end of a recorded pulse in an exacting manner and to pinpoint and make allowances for recording defects which may yet yield errors on playback. A residual error reduction technique complements the variable pulse recording process by detecting and temporarily storing data and respective address at which data could not be accurately recorded due to chemical or physical anomalies in the recording medium.

5323784, Jun 28, 1994

Apr 2, 1992

7/861949

Stephen K. Shu - Fountain Valley CA

Unisen, Inc. - Tustin CA

A61B 5024

128707

A simple heart rate calculation process is incorporated into an exercise machine. The user controls the process by counting his/her own pulse. With the exercise machine temporarily stopped, the user finds his/her pulse with one hand, and pushes a start/stop button with the other hand. The button is pushed to stop on a count of one, and then pushed to stop on a predetermined count, e. g. , 10. An embedded device automatically calculates and displays the user's heart rate.